Tunnel-furnace.



l Sweden, haveinvented newvand useful Imbustion in tunnel furnacesemployed for.

A proposed' to` introducethe preheated air berthroughchannels, in whichopen pipes pressure, hereby forcing Vin the air from The' presentinvention has-for its object jdinal section in Fig. l and in across-section cooling chamber which is` fed; with con L .According tothe present invention, there naces, 'of which the following .is-aspecificaa furnace.

- formed out of brick-work, the said 4chamber- V*being `placed crosswise'tothe'longitudinal direction of the furnace and .open toward v thecombustion chamber.

` UNITED ESTATEs rafrEnfij oEEicE.

ARTHUR RAMEN, or OLYMPIA, SWEDEN.

TUN NELFURNACE.

To all whom t may concern:

jBe it known that I, ARTHUR RAMEN, a subject of the ,KingJ of Sweden,vresiding at Villa 'Skausem Olympia, Helsingborg,

provementsin and Relating` to Tunnel-Fun tion. Forincreasing theltemperature o'f comburning,- for` instance ore bricks, lwhich fur*naces` consist of a channel divided into a preheating chamber, a.combustion chamber anda' cooling chamber, it has valready been presentinthe inner -end portion Aof fthe cooling 'chamberinto the combustioncham- 'for the introduction o-f air or. gas under the cooling Chamber tothe combustion chamber as byan injector action and mixfuel. l

a simpleand efcient'construction of such This construction isillustrated in theaocompanying drawing in avertical longituin]3`ig.2. ,Ib is the combustion chamber and cbthe ustion air from thedischarge.opening-d. f' j,

e is theinovable hearth,for instance corisisting of trucks andvseparating the upper channel or'p'art 0f'l theA furnace-from the lowerone f, and g is aconduit for 'introducing combustible gas; r

Vis .arranged between the cooling chamber cl and the combustion chamberZia chamberl of Above and-bw-- ,neath'thel sla-id'4 chamber thecombustion chamberW a'ndfgthe cooling chambery are in communication witheach other; In the' said chamber o', which-may be divided into severalcompartments, the gas, is introduced Specification of Letters Patent.

:and means for introducing sure into said transverse chamber.

under' pressure through the conduitA g,

Patented May 2*?, 1913.

Application filed February 61912. Sera1No- 675,890. i

which in case of a subdivided chamber. is

carried through both the side walls of 'the furnace, butin case of anon-divided chamber may penetrate only one of the said side walls. Fromthe chamber 0 the gas passes through its opening into the combustionchamber where it enters between two air currents, one above and theotherbelow the chamber o, thus causing by injector action an/abundantsupply of air to the combus-` specification. ing the said airintimately`with the gas or wI-Iaving now particularly described the nature ofmyinvention and the manner of its operation, what'vI Claim is:

l. In tunnel furnace, in combination, a 'cooling v chamber, l acombustion chamber, a chamber extending transversely of the furnace,said "chai'nber being positioned between said" combustion chamber andsaid cooling chamber and'provided with an opening Vcommunicating with-said combustion chamber, the up er and lower walls o f said transversecham er .being spaced from the -upper and lower wallA of the furnace,where-V by` said ,cooling and combustion chambers are in communicationwith one another above and 'below said transverse'chamber,

gas under pres- 2. In atunnel furnace, in combination, a coolingchamber, a combustion chamber. a

4chamber extending transversely of the fur! nace,'sa1d c/hainber beingpositioned between cooling'y said combustion' chamber and said chamberand provided with an opening communiating' with said `combustionchamber, .the-upper and lower- 'walls of said transversechamber beingspaced from the upper an'dlower wall/of the furnace, whereby saidcooling `'and combustion chambers areA in communication with one anotherabove and below said transverse chambery said trans- Verse chamber beingprovided with a Vertical, longitudinally extendingA Wall dividing saidchamber into com artments, and means 5 for introducing gas 'un erpressure'into each of saidcompartments.

. .In testimony whereof I 'have signed my name to this specification inthe presence of tivo subscribing Witnesses.

ARTHUR RAMN.

Witnesses;

GUSTAFMEYER, HUGO WENNCISTROM

